A SECURE DIGITAL SIGNATURE ALGORITHM BASED ON ELLIPTIC CURVE AND CHAOTIC MAPPINGS

摘要

A digital signature algorithm (DSA) based on elliptic curve and chaotic mappings is proposed to strengthen the security of an elliptic curve digital signature algorithm (ECDSA). To construct this algorithm, a one-way hash function (OWHF) based on two-dimensional (2D) hyperchaotic mappings and an improved elliptic curve public-key cryptography (IECPKC) are proposed, and two key exchange algorithms are introduced. Security analysis shows that this has better capability of resisting per-message secrets attack, repeated use of per-message secrets attack, and duplicate-signature key selection attack than an ECDSA. The proposed scheme is well suited for practical implementation.